Question

AYUDA.
-7+{10-[6-(8-10)+3(-3+4)-15]-17} =

Answer 1

-7+{10-[6-(8-10)+3(-3+4)-15]-17} =
-7+{10-[6-8+10-9+12-15]-17} =
-7+{10-6+8-10+9-12+15-17} =
-7+10-6+8-10+9-12+15-17=

suma de +: +10+8+9+15 = +42
suma de - : -7-6-10-12-17= -52

+42 - 52 = -10